SAGAK: Shikaku Logic Puzzle

Turn numbers into rectangles, and solved puzzles into stamps. SAGAK brings Shikaku to a paper-and-pencil world.

Turn numbers into rectangles, and solved puzzles into stamps. SAGAK brings Shikaku to a paper-and-pencil world.

What is Shikaku? Divide the entire grid into rectangles without gaps or overlaps. Each rectangle contains one number, and its area in cells equals that number.

One number, one rectangle. Cell count equals the number.

One sheet a day. Pencil lines drawn on paper.

The reason, not the answer. Techniques taught one step at a time.

Solve it, keep the stamp. One postmark. That is the whole celebration.

A month of stamps. An empty day is not failure — it is a space left.

12 notebooks, 240 puzzles. Solve 16 of 20 puzzles to open the next notebook.

Dark after hours. Light · Dark · Follow system.

Puzzles and progress stay on your device. No account is required. You can play offline. Some detailed content in additional languages falls back to English.